High-energy-resolution photoemission study of and

H. Kumigashira, A. Chainani, T. Yokoya, O. Akaki, T. Takahashi, M. Ito, M. Kasaya, O. Sakai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We studied the electronic structure of isostructural (Formula presented) and (Formula presented) using high-resolution low-temperature photoemission spectroscopy. (Formula presented) is a typical valence fluctuation material, while (Formula presented) is a low (Formula presented)(∼10 K) heavy-fermion system. The valence-band spectra show that Ni 3d derived states appear at energies closer to the Fermi level ((Formula presented)) compared to the Pt 5d derived states. The near-(Formula presented) spectra exhibit the characteristic spin-orbit splitting of 4f states (4(Formula presented) and 4(Formula presented)), with higher 4(Formula presented) intensity in (Formula presented) than in (Formula presented). Numerical simulations based on the single-impurity Anderson model show that the hybridization between the conduction band and f electrons is stronger in (Formula presented) than in (Formula presented). This is qualitatively understood in terms of proximity of Ni 3d states to the f level. The obtained spectroscopic results were discussed in comparison with transport and magnetic measurements.

Original languageEnglish
Pages (from-to)2565-2568
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number5
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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